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Question: The three diagrams in Fig. show a positive charge q moving with velocity v in different directions relative to the magnetic field B. The diagram uses the customary convention of dots representing B pointing out of the plane of the page (tips of arrowheads), and ×'s representing B pointing into the plane of the page (tail feathers of arrows). For each case, what is the direction of the force?
Fig. Three examples of charged particles moving in a uniform magnetic field. The dots mean that the magnetic field B points out of the page; the x's mean that the magnetic field B points into the page.
A 60 kg skier is in a tuck and moving straight down a 30 degree slope. What is the resultant of the external forces that act on the skier
Calculate the angle, between 0° and 90°, that the string makes with the pole. Take g = 9.81 m/s2. Find the tension of the string.
A rocket is projected upward from the earth's surface (r = RE) with an initial speed v0 that carries it to a distance r = 1.3 RE from the center of the earth. What is the launch speed
A merry go round has a moment of inertia of 1000 kgm^2. When it is rotating at 2.62 rad/sec, the motor shut off. How large was the friction torque
the armature of a simple ac generator has 20 circular loops of wire each with a radius of 10 cm. it is rotated with a
In refraction the angle of refraction depends on the wavelength, longer wavelengths bend less. How does the wavelength affect the angle of reflection
A horizontal spring-mass system has low friction, spring stiffness 225 N/m, and mass 0.2 kg. The system is released with an initial compression of the spring of 8 cm and an initial speed of the mass of 3 m/s.
A 1 cm3 air bubble at a depth of 209 meters and at a temperature of 4 oC rises to the surface of the lake where the temperature is 18 oC, what is its new volume
Suppose a car is traveling at +20.4 m/s, and the driver sees a traffic light turn red. obtain the stopping distance of the car
A disk-shaped merry-go-round of radius 2.99 and mass 170 rotates freely with an angular speed of 0.623. Calculate the final kinetic energy for this system
In a torus of inner radius 1.0m and outer radius 1.5m, a toroidal magnetic field of strength 5.0 tesla is required in the middle (i.e at R = 1.25m). Calculate the current that must pass through the wire to produce the required magnetic field
A 3kg object moving along the positive x direction with a speed of 10m/s exploeds into a 2kg and a 1kg fragments. what is the speed of the 2kg fragment?
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